fix rspecq teardown
fix rspecq teardown

rspecq teardown, check for AUTO_CANCELLED exists before trying to split.

Change-Id: I88f97a9785c694272f290b7257cea82e2d31bdcd
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/289328
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Andrea Cirulli <b4e55ef5ee4bae8ad31f7c81009bfc0af1714a1f@instructure.com>
Reviewed-by: Isaac Moore <258108225390078ef47d1319acab49ad7948abf1@instructure.com>
QA-Review: James Butters <4c5a489c9bb72d41f20b3b22aaf4c9b864e32f20@instructure.com>
Product-Review: James Butters <4c5a489c9bb72d41f20b3b22aaf4c9b864e32f20@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms